package org.misty.blog.util;

import org.thymeleaf.util.StringUtils;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Utils {
    public static String code(String str) {
        assert str != null && !str.isEmpty();
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            StringBuilder buf = new StringBuilder();
            int i;
            for (byte b : md.digest()) {
                i = b;
                if (i < 0) i += 256;
                if (i < 16) buf.append("0");
                buf.append(Integer.toHexString(i));
            }
            // 32位加密
            return buf.toString();
            // 16位加密
            // return buf.toString().substring(8,24);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) {
        System.out.println(code("123456"));
    }
}
